Fastening device



FIG. 1 is a top perspective view of a first embodiment of the invention.

FIG. 2 is a top plan view of FIG. 1.

FIG. 3 is a front elevation view of FIG. 1.

FIG. 4 is a right side elevation view of FIG. 1.

FIG. 5 is a left side elevation view of FIG. 1; and,

FIG. 6 is a bottom plan view of FIG. 1.

The broken lines in the figures depict portions of the fastening device that form no part of the claimed design. The dot-dash lines represent the boundary of the claim. 

CLAIM The ornamental design for a fastening device, as shown and described. 